Armed police have surrounded a flat in Clapham.
A man living on the street in south London says the whole of Clapham High Street from Clapham North to Clapham Common is cordoned off.
“Armed police are surrounding the back of a flat and are on the roof,” he said.
“They have been there about an hour now, and there’s a helicopter as well.”
Lambeth Police have tweeted: “Clapham High Street is currently closed while we await the assistance of LondonFire to remove someone from a roof. Thank you for your patience.”
Video footage taken by someone living opposite the incident shows a high level of police presence in the area.
BBC London Travel has tweeted: “Clapham High Street is closed. Lambeth MPS say someone is on a roof.
“Reports armed police are on scene. The A3 is queuing from Stockwell.”
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